Standard Sound Device - no custom drivers: The USB Sound Device is an industry standard device recognized by Windows, Apple OS 10 and LINUX. There are no custom device drivers to install and no compatibility problems with your favorite applications.

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Ultra low noise: - The sound circuits are designed with special attention to low noise - DigiKeyer II's noise floor is lower than any value priced soundcard or similar amateur product. - Dynamic range rivals that of professional products. - Special circuit design maintains full dynamic range and low noise floor with all radios - both high level and low level outputs.

Squelch input for signaling to computer- two inputs: one active low, second active high- ideal for Echolink and remote interfacing applications

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No external power adapter (where the radio provides auxiliary power) - No noisy DC to DC converters- USB and Sound chip are powered from the computer USB port- Controller is powered from transceiver or transceiver power supply- Will not overload your USB port

Note:DIGI KEYER II™ is a hardware product - it "fully supports" a radio when microHAM releases a cable set designed to interface DK IIto the specific input/output requirements of a supported transceiver. Due to differences in capabilities among transceivers, the support software (microHAM USB Device Router) and/or DigiKeyer II may not implement FSK and/or radio specific functions for all supported radios.